The thing is, if you create such a huge wordlist it has to be tested through, and this takes calculation time as well.
It would be smarter for such purposes to make some rainbowtables then.
However, I don't think there is a statistically height big enough in the usage of any characters or letters if there aren't words used; you may try E, e, a, A, 9, 1 and such as a first go though, but it's a lot of work.


